Shuttle.



F. E. VALOIS. SHUTTLE.

APPLIoATloN MLED Nov. s2, 1912,

Patented 0ct.7,1913,

kUni'rlin srA'rEs ,rArEnr Enron.

rELIxjEMILE vA-LOIS, oE-HAVEEHILL, MASSACHUSETTS, ASSIGNOR To HAMEL SHOEMACHINERY-COMPANY,., OE LYNN, MASSACHUSETTS, A CORPORATION OE MASSA-GHUSETTS.

SHUTTLE.

I Patenteaoct. 7,1913.

Application filed November 22,- 1912. -Serial N o. 732,989.

To' all 'whom t may concern itrknown that I,FELIX EMILE VALoIs, aCit/men of the United Sitatesfresiding1 at Haverhill, county of Essex,

State of Massgwhnsetts,- have invented -a certainnew andusefullmprovement in Shuttles, of which thej .following is aspecification, reference being. had therein to the- .accompanyingdrawings.'

@The present invention relates to look stitch sewing machines and more4particularly to that ty'pe of lock, stitch sewing machlnes used inthemanufacture of boots and-,shoes andknown asan outsole stitcher.

l,sin Fig. l to cause the loop of needle thread tobe passed about theshuttle and the bob-V The invention relates more particularly jto theshuttleandfbohbn mechanism of the machine, and` has for its. object toprovide a. vsimple and lmproved means for retaining vthe. bohbininthebobbini-case of the shuttle,

to provide an improved .tension device for the shuttle-thread, andfurther, to insure the.drawing out.v of the lshuttle-thread tosupplyslack thread for the next succeeding stitch after the vSettingofthe stitch last formed, 'all of which, objectsv are attained bythesimple construction illustrated in the accompanying drawing, and whichWill now vbe described.

The. invention therefore consists of the devices vand'combinations ofdevices which will .be .hereinafter `described and claimed.

The present invention is illustrated inthe accompanying `vdrawing, whichshows in Figure l a front elevation of a shuttle and its bobbin andshowing my improvement, connected therewith, the viewA illustrating insectional view. a portion of the stitched work, and the condition of thethread during the operation of the take-up in setting the stitchandbefore the 'shuttle returns to its starting position preparatory toagain engaging the loop of needle thread. Fig. Q shows aiverticalsectional view taken on the line2-2 in Fig. l. Fig.`3 Shows a frontelevation of the mechanism with the shuttle in engagement' with the loopof needle thread and on its Way-to the position Shown bin and?- tobecome interlocked With the shuttle thread. Fig. 4. shows a perspectivevieW the improved bobbinretaining `tension-applying and thread pullingguide removed. Fig. 5 shows a diagrammatic view illustrating thepull-oft function .of the 5, all of these guide. F ig.: 6 shows avertical sectional view ythrough the shuttle with the Lobbinandretaining plate removed.

In the drawings, l indicates the shuttle provlded with thethreadengaging hook 2, and the. bobbin chamber 3, having the centralpostor spindle 4 to receive thebobbin parts except in so far as may setforth being of the usual construction found in lock be hereinafter andordinary l stitch sewing machines of the type hereinbefore referred to.

.It Will be understood by those skilled in this art, thatv the shuttleis mounted in a circular race, it havinga peripheral rib 6 arrangedtoengage a guiding groove in the circular race, and that by suitablemechanisni the shuttle l is caused to reciprocate back and forth 5abouta central axial line forthe purpose of causing the hook 2 to engage theloop of needle thread as it is drawn back bythe needle and to carry saidloop of needle thread 'over and about the bobbin, the travel of theshuttlein 1one direction being about 'to the point shown in Fig. l atwhich point theloop of needle threadmay be drawn Vout o f the hook 2 bythe take-up 'mechanism of the machine and which by' a further pull drawsthe loop of lneedle thread, and the shuttle thread with 'which it isengaged, into the Work, as shown in Fig. l.l Vhen the shuttle hasreachedthe point shoivn in Fig. l, its movement is reversed and it returns toits starting"posi tion which is approximately' the position shown inFig. l, with the hook elevated and in position so that when it starts tomove tovvard the loop of needle thread the hook Will engage said loop asshoivnlin Fig. 3. T hus, as before statedythe shuttle has what might becalled acircular reciprocating in otion, and is generally referred to asa cir'- cularly moving shuttle. f

The bobbin 5 has a central aperture 7 arranged to be fitted upon theStud or spindle' 4, and in order to retain the bobbin Within the hobbinchamber 3, I' have provided a retaining plate 8 having at one end anelongated recess 9 arranged to engage an undercut projection or head l0`formed at theouter endof the post et. The retaining plate 8 at itsopposite end 4is bent at right'angles, as shown at 1l, and is, providedwith a spring latch arranged to be inserted in a recess 1 2 formed inthe shuttle l, the spring the over-running o end 21 to 4 in Fig. /A

entrance of the aperture small. circles latch being 'constructed tofrictionally engage the walls of the recess, and thus hold the lockingplate 8 with itsslot 9 engaged beneath the head 10 of the post 4. Thisdetachable retaining plate 534 eifectually holds the bobbin 5 in itschamber, but permits the free turning of the bobbin about the post 4..The spring latch may be of any suitable construction, but as shown inFigs. 2 and f1 of the drawing, wai'dly curved spring arms 13, securelyfastened tothe part 11 ofthe plate 8. These spring arms are normallyspaced apart a greater distance than the diameter of the 12 and whenforced through the aperture 12will be `slightly compressed.

At its rear. end the aperture 12 is enlarged as shown at 14, in Fig. 2forming a shoulderA 15 so that when the arms 13 reach the enlargedportion 14 of the aperture 12, they7 will spring outwardly and engagethe shoulder 15, thus firmly securing the plate 8 in its lockingposition.

The thread t leads from the bobbin through 'an aperture 16 whichconnects with the opening 12, and as shown in Figs. 2 and 4 the thread tpasses out through the openings,16 and 12 over the part 11 of the plate8 and is led through a hole 17 formed in the part 11 near its upper end,and thence the thread passes 'beneath theplate 8 and out through thethread guide 18 formed in the up-turnedend 19 of the plate 8. On its wayto the thread guide 18 the thread passes under a suitable tension devicew tain extent resists the withdrawal of the thread from the bobbin 'andthus prevents lf the bobbin, as the thread is drawn therefrom. Thistension device comprises a spring 20 fastened at its rear the under sideof the plate 8 and having at its opposite end an oii'set 22 arranged toclamp the thread against the under face of the plate 8. Thus the spring20 produces a continuous and invariable tension on the thread. V

For the purpose of insuring'that a certain aniountof shuttle threadshall be d rawn off for the next stitch,'1 have as will be noted, offsetthe thread guide 18 from the axis about which the shuttle 1 isoscillated, and this is clearly shown by the diagram `5.. ,The .axis ofoscillation of the shuttle is represented at a, and the thread guide 18moves about this axis with the shuttle, the range of movement about theaxis illustrated by the full and dotted line shown at 1' and'r in Fig.5, so of the sewing machine when the parts are in the position shown inFig. 1, draws vdownward upon .tlie thread t. thus drawing the loop t2intofjf the work in the manner shown in the com leted lock shown in Fig.1, thus drawing a that the take-up it comprises the outhich to a oerllthe slack of the' shuttle thread into the work. When the 'shuttlestarts backward in the direction shown by the arrow in Fig. 1 to resumeits starting position it carries the thread lguide from its lowermostvposition shown by the dotted lines r in Fig. 5 to its highest positionshown b the full lines r in Fig. 5, .and as the threa t is taut betweenthe thread guide 18 andthe work, as the shuttle starts itsreturn'niovenient this movement ofthe guide necessarily results inthefthread being drawn from the bobbin, thus providing slack thread forthe next stitch.

It'will bev noted that the end 19 which carries the thread guide 18 israised or elevated from the shuttle, as shown `clearly in Fig. 2, thuscausing the thread t as it leads vfrom the guide. 18 to he effectivelyheld away vfrom all the moving parts of the bobbin and shuttle, and thislI regard as an additional important feature of my invention.

It is thought that the operati n of the device will be -fully understoodby those skilled inthe art from the foregoing description and that afurther description of its opera."i tion is unnecessary.

What Iclaim is;

1. A circularlyl moving shuttle, having a bobbin chamber therein oneside of which is open, a central po-st for the bobbin, and a retainingplate located on the open side of the bobbin chamber, said retainingplate being detachably secured to the post Vat one end and detachablysecured to the shuttle at the other end. i

2; A circularly movingshuttle havingaI bobbin chamber therein, a centralpost for the bobbin, a retaining plate engaging t 'e post at one endland the shuttle at the other end, and a tension spring on the saidplate.

3. A circularly;` moving shuttle having in one face an open'lbobbinchamber, a post for the bobbin vprojecting centrally from the base ofthe bobbin chamber, a detachable rtaining plate located on the -openside of the bobbin-chamber, said retaining plate having at one end aslot for engagingthe head of the post and at its opposite end a-,compressible latch for having Y in gaging a recess in the shuttle andathread 125, bobbin guide carried by said retaining plate. 5. Acircularlymovable shuttle, a chamber in one face thfereof, a ost proectiIig-centrally from the .base o the-,bo bin chamber, a detachablelatch t)late having lat one end means for engaging "the post and atsurface of the bobbin or` and 'atits' its opposite end spring membersand a recess in theshuttle outside of the bobbin chamber for receivingt-he spring members of the latch plate.

(LA circularly'movable shuttle, a bobbin chamber in oneI face thereof, apost projecting centrally from the base of the bobbin cham-ber, adetachable latch plate having at one end means for engaging the postandatits opposite end means for engaging a. recess in the shuttle, atension spring secured to the said plate for engaging the bobbin threadand a thread guide.

7. In combination a circularly movable shuttle, a bobbin chambertherein, a post4 in said bobbin chamber for receiving the bobbin,.adetachable latch plat-e having means at one end for engaging the postanda detachable connection with the shuttle at its opposite end, atension Spring carried by the at one end for engaging the post, and adey tachable connection with the shuttle at its; opposite end and athread guide carried by `said latcl plate adjacent -the post engagin athread guide carriedlby said latch chamber therein, a post in end andelevated above the outer face ofsa l plate. v

In testimony whereof I affix my signature, in presence of two witnesses.

FELIX EMILE VALOIS. Witnesses:

'CHARLES A. HAMEL, VJorn: J. SULLIVAN.

i l Copies of this patent may be obtained for five cents each, byaddressing the Commissioner o! Patents,

' Washington, D. C."

